Article
Chemistry, Physical
M. Xing, Jeotikanta Mohapatra, J. Beatty, J. Elkins, Nil Kanatha Pandey, A. Chalise, W. Chen, M. Jin, J. Ping Liu
Summary: Localized heat generation using iron carbide nanoparticles with a thin carbon shell shows promising magnetothermal and photothermal effects when irradiated with a NIR laser, and exhibits enhanced specific absorption rate under an alternating magnetic field due to high magnetization and coercivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Sung-Po R. Chen, Valentin A. Bobrin, Zhongfan Jia, Michael J. Monteiro
Summary: In this study, we demonstrate a simple and effective solvent-free method to prepare anisotropic polymer nanoparticles directly in water by controlling polymer mobility through tuning its glass transition temperature (T-g). The morphology of the particles can be transformed from spherical to tadpole-like structures by cooling above the T-g, and can be reversed by heating above the T-g, showing a triggered and on-demand structural reorganization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
David Serantes, Daniel Baldomir
Summary: This study explores how the threshold size for magnetic agglomeration varies depending on the magnetic anisotropy constant K, finding that small variations in K may shift the threshold size by a few nanometers. A comparison with usual superparamagnetic estimation and energy competition approach is provided, while also analyzing the key role of anisotropy in hyperthermia performance.
Review
Polymer Science
Wei Zhao, Chenlong Li, Jun Chang, Huimin Zhou, Deshuo Wang, Jingjiang Sun, Tianqing Liu, Hui Peng, Qingfu Wang, Yanan Li, Andrew K. Whittaker
Summary: Magnetic resonance imaging (MRI) is a non-invasive imaging modality that provides detailed clinical information through the production of three-dimensional anatomical images with high spatial resolution. However, conventional MRI contrast agents have limitations, leading to the use of functional polymers with MRI detection capabilities. RAFT polymerization is a powerful tool for the precise formation of complex macromolecular building blocks and the preparation of polymeric nanoparticles suitable for biomedical applications.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Armando Ramos-Sebastian, So-Jung Gwak, Sung Hoon Kim
Summary: Magnetic microrobots are highly promising for biomedical applications, but magnetic actuation alone is not enough. This study introduces a multimodal electromagnetic system that enables various modes of locomotion and heating control of magnetic microrobots, as well as the manipulation of magnetic nanoparticles.
Article
Polymer Science
Gayathri Dev Ammini, Jordan P. P. Hooker, Joren Van Herck, Anil Kumar, Tanja Junkers
Summary: Continuous flow chemistry provides great operational flexibility for photochemical transformations. By using automated inline NMR monitoring with a variable DC power supply and precise control over light intensities, we conducted detailed kinetic investigations of PI-RAFT polymerizations. Our results showed increasing conversion with increasing light intensity until a saturation limit was reached, accompanied by an increase in residual polymer dispersity. However, when appropriate intensities were chosen, the reactions remained living. Additionally, quantitative study of the influence of the RAFT R-group emphasized the importance of selecting the right RAFT agent for photoRAFT polymerization.
Article
Polymer Science
Aaron Priester, Jimmy Yeng, Yuwei Zhang, Risheng Wang, Anthony J. Convertine
Summary: Polymer-Induced Self Assembly (PISA) is a technique that utilizes a macro chain transfer agent (macro-CTA) to induce phase separation during block copolymer formation, resulting in the in situ generation of nanostructures. This study focuses on developing a PISA resin for 3D printing using a difunctional macro-CTA, with the aim of maintaining the shape of printed parts without the need for a crosslinker through physical crosslinks between difunctional macro-CTAs.
Article
Biochemistry & Molecular Biology
Y. Jabalera, M. Montalban-Lopez, J. J. Vinuesa-Rodriguez, G. R. Iglesias, M. Maqueda, C. Jimenez-Lopez
Summary: The study aimed to develop an innovative nanoformulation for local antibacterial therapy, delivering the drug at the target while minimizing side effects to enhance effectiveness. The nanoassembly showed strong bactericidal effects on Gram-positive bacteria, E. coli, P. aeruginosa, and K. pneumoniae, particularly when combined with magnetic hyperthermia. The results suggest that this new formulation could be a promising tool in the fight against bacteria.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Multidisciplinary
Pavel Kim, Nikita Serov, Aleksandra Falchevskaya, Ilia Shabalkin, Andrei Dmitrenko, Daniil Kladko, Vladimir Vinogradov
Summary: A machine learning-based approach has been developed to predict the efficacy of magnetic nanoparticles in biomedicine applications such as magnetic resonance imaging (MRI) and hyperthermia treatment. A database of over 980 magnetic nanoparticles was assembled and tree-based ensemble models were trained to predict specific absorption rate (SAR) for hyperthermia and r(1)/r(2) relaxivities in MRI. The models showed promising performances, with R-2 values of 0.86, 0.78, and 0.75 for SAR, r(1), and r(2) respectively.
Article
Chemistry, Physical
Lluis Lopez-Conesa, Carlos Martinez-Boubeta, David Serantes, Sonia Estrade, Francesca Peiro
Summary: The nanoscale magnetic configuration of self-assembled groups of 40 nm cubic magnetite nanoparticles was investigated using electron holography in the transmission electron microscope (TEM). The arrangement of the cubes in chains driven by the alignment of their dipoles of single nanocubes was assessed by measured in-plane magnetic induction maps, showing good agreement with theoretical calculations.
Article
Chemistry, Multidisciplinary
Xiang Yu, Tianyu Yang, Ruoshui Liu, Di'an Wu, Daming Tian, Tianshi Zhou, Haitao Yan, Shuli He, Hao Zeng
Summary: In this study, the efficiency of alternating current magnetic field and near-infrared heating is enhanced by co-doping Zn and Co in magnetite nanoparticles. Optimum magnetic anisotropy is achieved by tuning the doping concentration to maximize the loss power under each magnetic field. The specific loss power of the nanoparticles greatly exceeds previous levels, making it a promising nanoplatform for multi-modal local hyperthermia therapy.
Article
Physics, Applied
Zs Iszaly, I Gresits, I. G. Marian, Gy Thuroczy, O. Sagi, B. G. Markus, F. Simon, I Nandori
Summary: Magnetic hyperthermia is an adjuvant therapy that uses magnetic nanoparticles to transfer energy and increase the local temperature of the human body. The combination of static and alternating magnetic fields can enhance this localization effect. Research shows a significant polarization effect in superlocalization for small frequencies and large field strengths, which is important for practical applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
C. A. Iglesias, J. C. R. De Araujo, E. F. Silva, M. Gamino, M. A. Correa, F. Bohn
Summary: We report two fundamental inequalities in the Stoner-Wohlfarth model. We investigate the theoretical limit for the initial magnetic susceptibility and find analytical solutions for the magnetization in the low-field regime. By introducing a general mean-field theory, we estimate the effects of dipolar and exchange interactions on the initial magnetic susceptibility in interacting Stoner-Wohlfarth-like systems.
Review
Chemistry, Multidisciplinary
Csilla Gyorgy, Steven P. Armes
Summary: It is well-known that polymerization-induced self-assembly (PISA) is a powerful technique for synthesizing colloidal dispersions of diblock copolymer nanoparticles. This review article aims to summarize the advances in PISA syntheses in non-polar media since the last review article in 2016. The article discusses PISA syntheses using RAFT polymerization in various non-polar solvents and examines the morphological transitions and rheological properties of the formed nanoparticles.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Multidisciplinary
C. L. Valente-Rodrigues, Richard J. Caraballo-Vivas, Evelyn C. S. Santos, Surender K. Sharma, Flavio Garcia
Summary: This study focuses on controlling the Curie temperature (TC) in the range of 42-46°C in magnetic hyperthermia therapy. By synthesizing Zn-Co nanoparticles with precise Cr3+ ion tuning, the self-regulation of TC can be achieved. The composition Zn0.54Co0.46Cr0.4Fe1.6O4 shows excellent magnetic hyperthermia effects, with the potential to automatically activate self-regulation in the safe temperature range.
Review
Chemistry, Physical
Elham Yammine, Eddy Souaid, Sami Youssef, Maher Abboud, Stephane Mornet, Michel Nakhl, Etienne Duguet
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2020)
Article
Chemistry, Multidisciplinary
Elham Yammine, Laurent Adumeau, Maher Abboud, Stephane Mornet, Michel Nakhl, Etienne Duguet
Summary: Fabrication of future materials through self-assembly of nano-building blocks programmed to generate specific lattices is a challenging goal of nanotechnology. A simple strategy to fabricate nanoparticles with multiple silica patches has been developed, showing potential applications in controlling the properties of particles through experimental parameters. Further developments include obtaining pure batches and optimizing the relative position of patches for repulsion figures.
Article
Chemistry, Multidisciplinary
Laurent Lermusiaux, Veronique Many, Philippe Barois, Virginie Ponsinet, Serge Ravaine, Etienne Duguet, Mona Treguer-Delapierre, Alexandre Baron
Summary: The study focuses on the design and chemical synthesis of plasmonic nanoresonators with a strong magnetic response in the visible range, demonstrating the effectiveness of a novel nanoscale structure in numerical simulations.
Article
Biochemistry & Molecular Biology
Bin Liu, Stephanie Exiga, Etienne Duguet, Serge Ravaine
Summary: This study presents a new method for fabricating silica nanoparticles with different numbers of patches, and demonstrates the formation of various structures through self-assembly.
Article
Multidisciplinary Sciences
Laurent Lermusiaux, Marie Plissonneau, Laure Bertry, Glenna L. Drisko, Valerie Buissette, Thierry Le Mercier, Etienne Duguet, Mona Treguer-Delapierre
Summary: This study investigates the effects of different synthesis protocols on the preparation of ultrathin metallic nanoshells, finding that seed density, polymer additives, and microwave treatment all play a role in influencing shell thickness and homogeneity. The results provide new insights into the synthesis of nanoshells, pushing the limits of ultrathin shell fabrication.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Maxime Bronchy, Lucien Roach, Laurent Mendizabal, Celine Feautrier, Etienne Durand, Jean-Marc Heintz, Etienne Duguet, Mona Treguer-Delapierre
Summary: This study examined the potential of silver nanocubes to achieve sintered conductive junctions for microelectronics and die-attach bonding devices. The nanocubes offer advantages of a higher proportion of surface atoms and the ability to assemble into denser 3D colloidal packings. By studying the thermal stability and electrical properties of nanocube arrays, it was found that the self-organized arrays with small gaps exhibited high electrical conductivity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Chemistry, Multidisciplinary
Lucien Roach, Adrian Hereu, Philippe Lalanne, Etienne Duguet, Mona Treguer-Delapierre, Kevin Vynck, Glenna L. Drisko
Summary: Monolayers of assembled nano-objects with controlled disorder are important for various optical applications. Bottom-up approaches are suitable for large-scale, low-cost fabrication of controlled disorder. This review discusses the quantification of monolayer disorder and the assembly methods used to create them, as well as the parameters affecting particle placement and the use of substrate patterning.
Article
Polymer Science
Bin Liu, Weiya Li, Etienne Duguet, Serge Ravaine
Summary: Self-assembly of nanosized building blocks is an efficient strategy for producing organized materials. In this study, the chaining of silica nanoparticles with polystyrene patches dispersed in tetrahydrofuran is investigated. The influence of patch-to-particle size ratio and the nature of the added nonsolvent are studied, showing that the chains can cyclize beyond a certain length. The addition of one-patch silica nanoparticles is also shown to control the length of the chains.
Article
Chemistry, Multidisciplinary
Bin Liu, Serge Ravaine, Etienne Duguet
Summary: We report a solvent-induced assembly method for synthesizing one-patch silica nanoparticles. By controlling multiple stages in the synthesis process, highly pure nanoparticles with a fine control of the patch-to-particle size ratio can be obtained. Self-assembly in specific solvent conditions leads to the formation of clusters and micelle structures with different sizes. The research provides an effective method for preparing nanostructures.
Article
Materials Science, Multidisciplinary
Shian Guan, Manuel Gaudon, Aline Rougier, Etienne Duguet, Etienne Durand, Alexandre Fargues, Oudomsack Viraphong, Nicolas Penin
Summary: By designing a V2O5@PVP core-shell structure, a uniform VO2 film with excellent thermal stability and attractive color was successfully fabricated. Three optimization strategies were used to control the film morphology, and the thermochromic behavior of the VO2 film was predicted through in situ characterization and simulation, providing guidance for future studies on discontinuous VO2 films.
Article
Nanoscience & Nanotechnology
Bin Liu, Etienne Duguet, Serge Ravaine
Summary: Particles with attractive patches were synthesized and assembled into dimers or trimers by controlling the patch-to-particle size ratio. When mixed with two-patch nanoparticles, one-patch nanoparticles acted as colloidal chain stoppers, controlling the length of the resulting chains. This strategy allows for the future fabrication of novel colloidal structures through controlled assembly of nanoparticles.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Laurent Lermusiaux, Lucien Roach, Moncef Lehtihet, Marie Plissonneau, Laure Bertry, Valerie Buissette, Thierry Le Mercier, Etienne Duguet, Glenna L. Drisko, Jacques Leng, Mona Treguer-Delapierre
Summary: We propose a new method for making ultrathin Ag nanoshells with high extinction in the infrared and low extinction in the visible. The use of near-infrared active ultrathin nanoshells with isotropic optical properties has potential for energy-saving applications. The synthesizing process involves the reduction of Tollens' reactant onto Sn2+-sensitized silica particles, followed by silver-nitrate reduction to form smooth shells with different morphologies. The resulting Ag-nanoshell films can convert 30% of near-infrared light into heat, making them suitable for window glazing in radiative screening.
Article
Chemistry, Physical
Celine Hubert, Cyril Chomette, Anthony Desert, Alexandra Madeira, Adeline Perro, Ileana Florea, Dris Ihiawakrim, Ovidiu Ersen, Anna Lombardi, Etienne Pertreux, Fabien Vialla, Paolo Maioli, Aurelien Crut, Natalia Del Fatti, Fabrice Vallee, Jerome Majimel, Serge Ravaine, Etienne Duguet, Mona Treguer-Delapierre
Summary: Highly symmetrical gold nanocages with a controllable number of circular windows can be produced through a multi-step synthesis approach, allowing for customization of the guest particle and host cage and opening new routes towards the fabrication of hollow nanostructures for various applications.
NANOSCALE HORIZONS
(2021)
Article
Chemistry, Multidisciplinary
Nabila Tanjeem, Cyril Chomette, Nicholas B. Schade, Serge Ravaine, Etienne Duguet, Mona Treguer-Delapierre, Vinothan N. Manoharan
Summary: A new approach to making plasmonic metamolecules with well-controlled resonances at optical wavelengths is described, utilizing a multi-step colloidal synthesis method to achieve nanometer-scale precision in morphology. Using single-cluster spectroscopy, it is shown that the plasmonic resonances are reproducible from cluster to cluster. By comparing the spectra to theory, the multi-step synthesis approach is demonstrated to control the distances between metallic surfaces with nanometer-scale precision.
MATERIALS HORIZONS
(2021)
Article
Chemistry, Multidisciplinary
Saruta Deeprasert, Lilin Wang, Konstantinos Simeonidis, Nguyen Thi Kim Thanh, Etienne Duguet, Stefanos Mourdikoudis
Summary: The study describes a synthesis method for nanocomposites composed of silica nanoparticles decorated with magnetic maghemite nanoparticles on their surface dimples, for use in detecting and recovering arsenic in water. The process involves amination and carboxylation to graft the maghemite nanoparticles onto the silica nanoparticles, resulting in magnetic nanocomposites suitable for environmentally friendly arsenic detection and removal. This approach shows promise in the field of environmental remediation.
Article
Polymer Science
Mustafa Kalay, Abidin Esidir, Mahmut Ruzi, N. Burak Kiremitler, Mustafa Serdar Onses
Summary: This study proposes stable and addressable polymer PUFs, utilizing a cross-linkable polymer system, which demonstrates high stochastic characteristics and low-cost production. The performance of the polymer features is evaluated through various analyses, and direct image authentication is achieved using feature matching algorithms.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jingyu Jin, Guoqiang Lu, Jun Nie, Xiaoqun Zhu
Summary: Photopolymerization technology is limited in the fields of food packaging and biomedicine due to the high migration of small molecules from photoinitiators. In this study, a polymerizable 2-vinyl thioxanthone (ETX) was synthesized to improve the migration stability of photoinitiators. Macromolecular photoinitiators (PPI1, PPI2) were also prepared to further reduce migration. The results showed that the ETX/TEOA system had higher initiation performance and PPI2 displayed favorable initiation ability. Additionally, the migration of ETX, PPI1, and PPI2 in photocured film was significantly reduced. These low-migration photoinitiators have potential applications in the fields of food packaging and biological materials.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Weijie Li, Jun Nie, Yingying Zhao, Xiaoqun Zhu
Summary: This study focuses on the development of high-performance, low-migration photoinitiators. A polymerizable photoinitiator (VBP) was synthesized by introducing an ethylene group into benzophenone, and three different molecular weight single-component photoinitiators (PVBN1-3) were synthesized based on VBP. The results show that these new photoinitiators have stronger absorption ability compared to benzophenone and significantly reduce the migration of initiators and co-initiators, addressing the safety concerns caused by migration.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Seira Morimune-Moriya, Yuki Iwahashi, Mitsuru Nakamura, Daisuke Ogawa, Keiji Nakamura
Summary: This study investigates the effect of plasma treatment on carbon nanotubes (CNTs) and the structure/properties of polyimide (PI) nanocomposites with ultra-low content of CNTs. The results show that plasma treatment introduces isocyanate groups on the surface of CNTs and enhances the interfacial interaction between PI and treated CNTs. This leads to a significant improvement in the mechanical properties of the nanocomposites, with even a small addition of treated CNTs showing a substantial increase in Young's modulus, tensile strength and toughness.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuanlong Li, Chaojie Chen, Guoqing Cui, Li Liu, Chao Zhou, Guangfeng Wu
Summary: In this study, a novel ion-conducting hydrogel was fabricated using a straightforward approach. The hydrogel showed excellent tensile properties and high toughness due to physical interactions and covalent binding. Additionally, the introduction of hydroxyethyl cellulose and lithium chloride improved the biocompatibility, mechanical properties, electrical conductivity, and frost resistance of the hydrogel, demonstrating its potential for cold climate applications.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Dengwei Yan, Jinxian Yang, Xuejun Pan, Xiaozheng Duan, Lianwei Li, Mo Zhu
Summary: The influence of backbone length on grafting efficiency during the graft-onto reaction process was investigated. It was found that the polydispersity effect of backbone length does not affect the final grafting efficiency, indicating that the local dynamics of chain segments dominate the graft-onto process.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Zhaoyi Luo, Xianjie Pan, Fanqi Liu, Quanxi Yi, Yanning Zeng, Yunhua Chen, Chaoyang Wang
Summary: This study provides a method to prepare high-performance epoxy materials with good malleability and thermal stability. The materials have self-healing and welding capabilities, thanks to the addition of specific chemical bonds and network structures. They exhibit mechanical properties comparable to commercial epoxy resins and show great potential for sustainable industrial development.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Chaoji Xiong, Hao Wang, Lihua Deng, Kun Liang, Chunhua Wu, Wei Wu, Qian Chen
Summary: In this study, four polyamides were synthesized and their adsorption performances for Hg2+ in aqueous systems were investigated. The polyamides exhibited high adsorption capacities and excellent reusability, with the involvement of sulfur, nitrogen, and oxygen in the chemical adsorption process of Hg2+.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Siim Laanesoo, Olivier Bonjour, Rauno Sedrik, Iris Tamsalu, Patric Jannasch, Lauri Vares
Summary: The insertion of rigid aliphatic or aromatic building blocks in polymer structures is an effective way to synthesize high -Tg polymer materials. In this study, a series of isosorbide-2-aryl carboxylate-5-methacrylate monomers (ArIMAs) were synthesized by functionalizing isosorbide 5-methacrylate with various aromatic lignin-inspired esters. These monomers were polymerized to obtain high molecular-weight poly(aryl carboxylate isosorbide methacrylates) (PArIMAs). The resulting polymers showed high glass transition temperatures and thermal stability, making them suitable for use as high-performance plastics and coatings.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuqian Wu, Weijie Xu, Jianliang Li, Zhangfeng Zhong, Liqing Huang, Shengke Li, Huaping Tan
Summary: This study investigates the improvement of degradation and drug release characteristics of dynamic Schiff base-mediated natural polysaccharide hydrogels using tannic acid (TA), leading to enhanced stability and functionality.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Xi Zhang, Xiangli Kong, Xin Zhou, Yiyan Gao, Yibo Sun, Guanghui Gao, Wei Liu, Kai Shi
Summary: Conductive hydrogels have great development prospects in flexible strain sensors, but long-term direct contact with human skin can cause bacterial infection. A hydrogel with antibacterial, biocompatibility, and toughness was designed and manufactured using a freeze-thaw method. The hydrogel maintains tensile properties and fatigue resistance at low temperatures and is resistant to bacteria. Therefore, hydrogel sensors can be used to monitor human movements.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Wei Zhang, Jiangang Yu, Mingyang Wu, Rui Li, Anqiang Zhang, Yaling Lin
Summary: In this study, polyacrylamide containing quaternary ammonium salts (PAM-X) were synthesized and found to effectively inhibit soil-borne pathogenic fungi while maintaining the balance of microbial population in soil. PAM-X also showed low toxicity to earthworms and fish, providing a new method for the prevention and control of soil-borne fungal diseases.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jiawen He, Haojie Yu, Li Wang, Jian Yang, Yanhui Zhang, Wenbing Huang, Chenguang Ouyang
Summary: This review discusses the use of polymeric hydrogels for atmospheric water harvesting (AWH), including the mechanism of water sorption, fabrication methods, and strategies for optimizing the structure of hydrogels. The extended applications of hygroscopic photothermal hydrogels, such as agricultural irrigation and dehumidification, are also explored. The challenges and prospects of using polymeric hydrogels for AWH are summarized.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Ying Du, Shuaishuai Lu, Yuanna Sun, Qingshan Li, Xinhai He
Summary: This study introduces a method to improve the performance of hydrogels by incorporating proline, resulting in hydrogels with excellent stretchability, high conductivity, and long-term stability. The hydrogel remains flexible and conductive even at ultra-low temperatures.
EUROPEAN POLYMER JOURNAL
(2024)
